Question

unit 1, lc2 practice
which of these is an example of a chemical change?
o snow melting on the sidewalk
o bananas turning brown as they ripen
o crumbling a cookie into smaller pieces
o liquid gold turning into solid gold in a jewelry mold

Explanation:

A chemical change results in the formation of new substances. When bananas turn brown as they ripen, it is due to a chemical reaction (enzymatic browning) that changes the chemical composition of the banana. Snow melting is a physical change (change of state from solid to liquid). Crumbling a cookie is a physical change (change in size/shape). Liquid gold turning to solid gold is a physical change (change of state from liquid to solid).

Answer:

bananas turning brown as they ripen